I've been using the set-it-and-forget-it method forever with no problems (12.5 psi). A little over a week ago, I threw in a new keg of RIS and while it will push out the beer through the tap no problem, it isn't hardly carbed at all. I had just kegged a beer a week before this RIS and it's carbed and drinking nicely (after only a week or so of being on the gas). As per the gauge the gas, the tank has co2 in it, and I can confirm this by purging the keg and hearing CO2 move back in to replace what was let out. I doubt the keg is leaking, because if it was, I'd have an empty co2 tank. What gives? Ideas?